How to Detect a Faulty PV Module in an Array

If a user finds that the system power generation is significantly lower in the same season, or significantly lower than that of a neighboring system with the same installed capacity, the system may be abnormal. By monitoring abnormal fluctuations in the combiner box data, the user can promptly detect whether a string of modules in the PV array is faulty, then contact professionals to diagnose the system with clamp meters, thermal imaging cameras, and other professional equipment, and finally determine which module in the system is problematic.